Wednesday, 1 April 2009

1st April 2009 - Left over-door panel

First job today was to complete the fairing between the bottom of the windscreen and the firewall. The holes through the screen were drilled out for #8 screws, the fairing dimpled and the screen countersunk. Next the fairing was match drilled to the firewall using a #40 drill. This will rivet in place during final assembly together with the upper mount for the cowl. The main objective for the day was to close the gap between the top of the door and the windscreen on the left side of the aircraft. First the dummy root rib was positioned to identify where joints in the panelling could be positioned to be hidden. Note the way that the top of the screen follows as much of the line of the top of the root rib as possible. This was done deliberately http://tailwindbuild.blogspot.com/2008/10/10th-october-2008-windscreen-support.html to make the intersection between the fuselage and wing as clean as possible. Next a piece of 0.025" thick 6160-T6 aluminium was cut out to fit over the spar attach brackets. The top was trimmed flush with the top of the windscreen. The bottom was folded into a "U" section to stiffen the edge where the door will seal. The "U" will also provide a support for the wing strobe and nav light cables and the pitot tube. An internal trim panel will then be screwed to the inside leg of the "U" and tabs on the top longeron to tidy up the interior. Next a piece of the 0.025" sheet was cut out and folded into a right angle section to form the joint between the top of the above door panel and the screen. This was then shaped using the shrinker to conform to the shape of the top of the screen. It was then match drilled to the windscreen support tabs and the holes dimpled/countersunk as before. That completes the above left above door panel with the exception of welding in place attach tabs for it and the internal trim panel.

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